./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3aed15da12260a7de82b1d58a50eef3670797f2722612a66426441482ea1c194 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:48:24,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:48:24,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:48:24,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:48:24,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:48:24,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:48:24,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:48:24,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:48:24,275 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:48:24,276 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:48:24,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:48:24,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:48:24,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:48:24,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:48:24,278 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:48:24,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:48:24,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:48:24,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:48:24,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:48:24,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:48:24,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:48:24,282 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:48:24,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:48:24,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:48:24,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:48:24,283 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:48:24,284 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:48:24,284 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:48:24,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:48:24,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:48:24,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:48:24,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:48:24,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:48:24,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:48:24,286 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:48:24,286 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:48:24,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:48:24,287 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:48:24,287 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:48:24,287 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:48:24,287 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:48:24,288 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:48:24,288 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3aed15da12260a7de82b1d58a50eef3670797f2722612a66426441482ea1c194 [2023-11-29 00:48:24,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:48:24,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:48:24,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:48:24,563 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:48:24,563 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:48:24,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i [2023-11-29 00:48:27,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:48:27,672 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:48:27,672 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i [2023-11-29 00:48:27,686 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/data/a709448ca/6aad6510326446349ae67e9ad78d2028/FLAGf2d95932d [2023-11-29 00:48:27,701 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/data/a709448ca/6aad6510326446349ae67e9ad78d2028 [2023-11-29 00:48:27,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:48:27,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:48:27,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:48:27,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:48:27,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:48:27,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:48:27" (1/1) ... [2023-11-29 00:48:27,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479d77d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:27, skipping insertion in model container [2023-11-29 00:48:27,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:48:27" (1/1) ... [2023-11-29 00:48:27,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:48:27,926 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i[916,929] [2023-11-29 00:48:28,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:48:28,072 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:48:28,085 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i[916,929] [2023-11-29 00:48:28,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:48:28,174 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:48:28,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28 WrapperNode [2023-11-29 00:48:28,174 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:48:28,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:48:28,176 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:48:28,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:48:28,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,262 INFO L138 Inliner]: procedures = 26, calls = 96, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 585 [2023-11-29 00:48:28,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:48:28,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:48:28,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:48:28,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:48:28,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,316 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:48:28,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:48:28,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:48:28,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:48:28,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:48:28,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (1/1) ... [2023-11-29 00:48:28,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:48:28,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:28,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:48:28,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:48:28,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:48:28,442 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:48:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:48:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:48:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:48:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:48:28,585 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:48:28,588 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:48:29,312 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:48:29,353 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:48:29,353 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:48:29,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:48:29 BoogieIcfgContainer [2023-11-29 00:48:29,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:48:29,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:48:29,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:48:29,359 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:48:29,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:48:27" (1/3) ... [2023-11-29 00:48:29,360 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e943dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:48:29, skipping insertion in model container [2023-11-29 00:48:29,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:28" (2/3) ... [2023-11-29 00:48:29,360 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e943dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:48:29, skipping insertion in model container [2023-11-29 00:48:29,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:48:29" (3/3) ... [2023-11-29 00:48:29,362 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-13.i [2023-11-29 00:48:29,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:48:29,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:48:29,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:48:29,433 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b62da07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:48:29,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:48:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 140 states have (on average 1.5714285714285714) internal successors, (220), 141 states have internal predecessors, (220), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-29 00:48:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-29 00:48:29,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:29,471 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:29,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:29,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1011271138, now seen corresponding path program 1 times [2023-11-29 00:48:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:29,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629705789] [2023-11-29 00:48:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:29,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:29,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629705789] [2023-11-29 00:48:29,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:48:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824864376] [2023-11-29 00:48:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:29,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:29,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:29,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:48:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:30,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:48:30,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2023-11-29 00:48:30,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:30,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824864376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:30,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:30,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:48:30,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408959703] [2023-11-29 00:48:30,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:48:30,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:48:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:48:30,339 INFO L87 Difference]: Start difference. First operand has 226 states, 140 states have (on average 1.5714285714285714) internal successors, (220), 141 states have internal predecessors, (220), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-29 00:48:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:30,412 INFO L93 Difference]: Finished difference Result 448 states and 851 transitions. [2023-11-29 00:48:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:48:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) Word has length 521 [2023-11-29 00:48:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:30,426 INFO L225 Difference]: With dead ends: 448 [2023-11-29 00:48:30,427 INFO L226 Difference]: Without dead ends: 223 [2023-11-29 00:48:30,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:48:30,437 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:30,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 374 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-29 00:48:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-11-29 00:48:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-29 00:48:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 377 transitions. [2023-11-29 00:48:30,520 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 377 transitions. Word has length 521 [2023-11-29 00:48:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:30,521 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 377 transitions. [2023-11-29 00:48:30,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-29 00:48:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 377 transitions. [2023-11-29 00:48:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-29 00:48:30,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:30,539 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:30,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:48:30,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:30,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1730990232, now seen corresponding path program 1 times [2023-11-29 00:48:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:30,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526048331] [2023-11-29 00:48:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:30,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:30,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835978543] [2023-11-29 00:48:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:30,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:30,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:30,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:30,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:48:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:31,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:31,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:48:31,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:31,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526048331] [2023-11-29 00:48:31,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835978543] [2023-11-29 00:48:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835978543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:31,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:31,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618799800] [2023-11-29 00:48:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:31,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:31,361 INFO L87 Difference]: Start difference. First operand 223 states and 377 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:31,470 INFO L93 Difference]: Finished difference Result 660 states and 1115 transitions. [2023-11-29 00:48:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 521 [2023-11-29 00:48:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:31,479 INFO L225 Difference]: With dead ends: 660 [2023-11-29 00:48:31,479 INFO L226 Difference]: Without dead ends: 438 [2023-11-29 00:48:31,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:31,482 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 337 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:31,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 739 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-29 00:48:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2023-11-29 00:48:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 267 states have (on average 1.4943820224719102) internal successors, (399), 267 states have internal predecessors, (399), 166 states have call successors, (166), 2 states have call predecessors, (166), 2 states have return successors, (166), 166 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-29 00:48:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 731 transitions. [2023-11-29 00:48:31,555 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 731 transitions. Word has length 521 [2023-11-29 00:48:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:31,558 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 731 transitions. [2023-11-29 00:48:31,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 731 transitions. [2023-11-29 00:48:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:31,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:31,564 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:31,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:48:31,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:31,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1553671721, now seen corresponding path program 1 times [2023-11-29 00:48:31,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:31,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268122163] [2023-11-29 00:48:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:31,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:31,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525476170] [2023-11-29 00:48:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:31,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:31,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:48:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:32,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:32,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:48:32,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:32,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:32,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268122163] [2023-11-29 00:48:32,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:32,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525476170] [2023-11-29 00:48:32,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525476170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:32,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:32,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:32,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216718882] [2023-11-29 00:48:32,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:32,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:32,258 INFO L87 Difference]: Start difference. First operand 436 states and 731 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:32,317 INFO L93 Difference]: Finished difference Result 931 states and 1546 transitions. [2023-11-29 00:48:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-29 00:48:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:32,324 INFO L225 Difference]: With dead ends: 931 [2023-11-29 00:48:32,325 INFO L226 Difference]: Without dead ends: 496 [2023-11-29 00:48:32,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:32,328 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 36 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:32,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 769 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-29 00:48:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 492. [2023-11-29 00:48:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 309 states have (on average 1.4724919093851132) internal successors, (455), 311 states have internal predecessors, (455), 178 states have call successors, (178), 4 states have call predecessors, (178), 4 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-11-29 00:48:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 811 transitions. [2023-11-29 00:48:32,398 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 811 transitions. Word has length 522 [2023-11-29 00:48:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:32,400 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 811 transitions. [2023-11-29 00:48:32,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 811 transitions. [2023-11-29 00:48:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:32,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:32,406 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:32,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:32,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:32,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash 542554471, now seen corresponding path program 1 times [2023-11-29 00:48:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:32,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275385815] [2023-11-29 00:48:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:32,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:32,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:32,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396593314] [2023-11-29 00:48:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:32,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:32,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:32,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:32,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:48:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:33,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:48:33,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:48:33,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:33,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:33,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275385815] [2023-11-29 00:48:33,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:33,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396593314] [2023-11-29 00:48:33,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396593314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:33,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:33,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:48:33,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70780673] [2023-11-29 00:48:33,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:33,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:48:33,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:33,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:48:33,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:48:33,991 INFO L87 Difference]: Start difference. First operand 492 states and 811 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:34,604 INFO L93 Difference]: Finished difference Result 1612 states and 2624 transitions. [2023-11-29 00:48:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:48:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-29 00:48:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:34,617 INFO L225 Difference]: With dead ends: 1612 [2023-11-29 00:48:34,617 INFO L226 Difference]: Without dead ends: 1121 [2023-11-29 00:48:34,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:48:34,621 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 479 mSDsluCounter, 1823 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:34,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 2187 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2023-11-29 00:48:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1049. [2023-11-29 00:48:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 684 states have (on average 1.4649122807017543) internal successors, (1002), 688 states have internal predecessors, (1002), 356 states have call successors, (356), 8 states have call predecessors, (356), 8 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2023-11-29 00:48:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1714 transitions. [2023-11-29 00:48:34,816 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1714 transitions. Word has length 522 [2023-11-29 00:48:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:34,818 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1714 transitions. [2023-11-29 00:48:34,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1714 transitions. [2023-11-29 00:48:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:34,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:34,824 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:34,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:35,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 00:48:35,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:35,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash 800719909, now seen corresponding path program 1 times [2023-11-29 00:48:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:35,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617018715] [2023-11-29 00:48:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:35,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:35,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717705459] [2023-11-29 00:48:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:35,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:35,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:35,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:48:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:35,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:48:35,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 6778 proven. 138 refuted. 0 times theorem prover too weak. 6696 trivial. 0 not checked. [2023-11-29 00:48:36,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 108 proven. 138 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-29 00:48:37,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:37,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617018715] [2023-11-29 00:48:37,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:37,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717705459] [2023-11-29 00:48:37,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717705459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:37,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 00:48:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650005254] [2023-11-29 00:48:37,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:48:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:48:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:48:37,301 INFO L87 Difference]: Start difference. First operand 1049 states and 1714 transitions. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 4 states have call successors, (166), 3 states have call predecessors, (166), 5 states have return successors, (166), 4 states have call predecessors, (166), 4 states have call successors, (166) [2023-11-29 00:48:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:38,725 INFO L93 Difference]: Finished difference Result 3727 states and 5997 transitions. [2023-11-29 00:48:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:48:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 4 states have call successors, (166), 3 states have call predecessors, (166), 5 states have return successors, (166), 4 states have call predecessors, (166), 4 states have call successors, (166) Word has length 522 [2023-11-29 00:48:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:38,746 INFO L225 Difference]: With dead ends: 3727 [2023-11-29 00:48:38,746 INFO L226 Difference]: Without dead ends: 2679 [2023-11-29 00:48:38,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:48:38,752 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 998 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:38,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1410 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:48:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2023-11-29 00:48:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2639. [2023-11-29 00:48:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 1730 states have (on average 1.4346820809248555) internal successors, (2482), 1746 states have internal predecessors, (2482), 880 states have call successors, (880), 28 states have call predecessors, (880), 28 states have return successors, (880), 864 states have call predecessors, (880), 880 states have call successors, (880) [2023-11-29 00:48:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4242 transitions. [2023-11-29 00:48:39,089 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4242 transitions. Word has length 522 [2023-11-29 00:48:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4242 transitions. [2023-11-29 00:48:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 4 states have call successors, (166), 3 states have call predecessors, (166), 5 states have return successors, (166), 4 states have call predecessors, (166), 4 states have call successors, (166) [2023-11-29 00:48:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4242 transitions. [2023-11-29 00:48:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:39,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:39,096 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:39,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:48:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:39,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:39,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:39,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1004718425, now seen corresponding path program 1 times [2023-11-29 00:48:39,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:39,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567212349] [2023-11-29 00:48:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:39,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:39,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:39,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983152556] [2023-11-29 00:48:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:39,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:39,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:39,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:39,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:48:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:39,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:39,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 5556 proven. 177 refuted. 0 times theorem prover too weak. 7879 trivial. 0 not checked. [2023-11-29 00:48:40,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 69 proven. 177 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-29 00:48:40,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567212349] [2023-11-29 00:48:40,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983152556] [2023-11-29 00:48:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983152556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:40,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:40,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:48:40,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449589629] [2023-11-29 00:48:40,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:48:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:48:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:48:40,629 INFO L87 Difference]: Start difference. First operand 2639 states and 4242 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-29 00:48:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:41,227 INFO L93 Difference]: Finished difference Result 3743 states and 5999 transitions. [2023-11-29 00:48:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:48:41,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) Word has length 522 [2023-11-29 00:48:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:41,238 INFO L225 Difference]: With dead ends: 3743 [2023-11-29 00:48:41,238 INFO L226 Difference]: Without dead ends: 1105 [2023-11-29 00:48:41,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1036 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:48:41,248 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 491 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:41,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 671 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-11-29 00:48:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1081. [2023-11-29 00:48:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 708 states have (on average 1.423728813559322) internal successors, (1008), 712 states have internal predecessors, (1008), 356 states have call successors, (356), 16 states have call predecessors, (356), 16 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2023-11-29 00:48:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1720 transitions. [2023-11-29 00:48:41,436 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1720 transitions. Word has length 522 [2023-11-29 00:48:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:41,437 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1720 transitions. [2023-11-29 00:48:41,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-29 00:48:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1720 transitions. [2023-11-29 00:48:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:41,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:41,443 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:41,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:48:41,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:41,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:41,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1459715747, now seen corresponding path program 1 times [2023-11-29 00:48:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:41,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629113093] [2023-11-29 00:48:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:41,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:41,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982845188] [2023-11-29 00:48:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:41,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:41,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:41,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:41,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:48:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:42,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:48:42,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:48:43,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:43,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629113093] [2023-11-29 00:48:43,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982845188] [2023-11-29 00:48:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982845188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:43,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:48:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874986858] [2023-11-29 00:48:43,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:48:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:43,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:48:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:48:43,731 INFO L87 Difference]: Start difference. First operand 1081 states and 1720 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:44,219 INFO L93 Difference]: Finished difference Result 2533 states and 4039 transitions. [2023-11-29 00:48:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:48:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-29 00:48:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:44,232 INFO L225 Difference]: With dead ends: 2533 [2023-11-29 00:48:44,232 INFO L226 Difference]: Without dead ends: 1453 [2023-11-29 00:48:44,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:48:44,237 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 324 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:44,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1639 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:48:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2023-11-29 00:48:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1349. [2023-11-29 00:48:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 890 states have (on average 1.448314606741573) internal successors, (1289), 894 states have internal predecessors, (1289), 439 states have call successors, (439), 19 states have call predecessors, (439), 19 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-29 00:48:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 2167 transitions. [2023-11-29 00:48:44,497 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 2167 transitions. Word has length 522 [2023-11-29 00:48:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:44,498 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 2167 transitions. [2023-11-29 00:48:44,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 2167 transitions. [2023-11-29 00:48:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:44,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:44,504 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:44,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:48:44,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:44,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:44,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 180481955, now seen corresponding path program 1 times [2023-11-29 00:48:44,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:44,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482389785] [2023-11-29 00:48:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:44,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606838714] [2023-11-29 00:48:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:44,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:44,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:44,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:48:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:45,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:48:45,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:48:45,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:45,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482389785] [2023-11-29 00:48:45,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606838714] [2023-11-29 00:48:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606838714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:45,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769715826] [2023-11-29 00:48:45,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:45,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:45,146 INFO L87 Difference]: Start difference. First operand 1349 states and 2167 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:45,287 INFO L93 Difference]: Finished difference Result 2569 states and 4095 transitions. [2023-11-29 00:48:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:45,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-29 00:48:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:45,301 INFO L225 Difference]: With dead ends: 2569 [2023-11-29 00:48:45,301 INFO L226 Difference]: Without dead ends: 1489 [2023-11-29 00:48:45,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:45,306 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 18 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:45,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 718 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2023-11-29 00:48:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1455. [2023-11-29 00:48:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 996 states have (on average 1.4548192771084338) internal successors, (1449), 1000 states have internal predecessors, (1449), 439 states have call successors, (439), 19 states have call predecessors, (439), 19 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-29 00:48:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2327 transitions. [2023-11-29 00:48:45,551 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2327 transitions. Word has length 522 [2023-11-29 00:48:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:45,552 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 2327 transitions. [2023-11-29 00:48:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2327 transitions. [2023-11-29 00:48:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:45,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:45,558 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:45,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:45,758 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:45,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash 180541537, now seen corresponding path program 1 times [2023-11-29 00:48:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:45,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499040174] [2023-11-29 00:48:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:45,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:45,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585033099] [2023-11-29 00:48:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:45,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:45,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:45,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:45,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:48:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:46,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:48:46,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 408 proven. 243 refuted. 0 times theorem prover too weak. 12961 trivial. 0 not checked. [2023-11-29 00:48:46,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 3 proven. 243 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-29 00:48:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499040174] [2023-11-29 00:48:46,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585033099] [2023-11-29 00:48:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585033099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:46,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:48:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198689880] [2023-11-29 00:48:46,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:46,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:48:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:48:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:48:46,993 INFO L87 Difference]: Start difference. First operand 1455 states and 2327 transitions. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 3 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 3 states have call predecessors, (165), 3 states have call successors, (165) [2023-11-29 00:48:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:47,782 INFO L93 Difference]: Finished difference Result 3285 states and 5107 transitions. [2023-11-29 00:48:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:48:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 3 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 3 states have call predecessors, (165), 3 states have call successors, (165) Word has length 522 [2023-11-29 00:48:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:47,798 INFO L225 Difference]: With dead ends: 3285 [2023-11-29 00:48:47,799 INFO L226 Difference]: Without dead ends: 2099 [2023-11-29 00:48:47,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:48:47,804 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 588 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:47,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1233 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:48:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2023-11-29 00:48:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1531. [2023-11-29 00:48:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1063 states have (on average 1.4336782690498588) internal successors, (1524), 1067 states have internal predecessors, (1524), 439 states have call successors, (439), 28 states have call predecessors, (439), 28 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-29 00:48:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2402 transitions. [2023-11-29 00:48:48,076 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2402 transitions. Word has length 522 [2023-11-29 00:48:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:48,078 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 2402 transitions. [2023-11-29 00:48:48,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 3 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 3 states have call predecessors, (165), 3 states have call successors, (165) [2023-11-29 00:48:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2402 transitions. [2023-11-29 00:48:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-29 00:48:48,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:48,083 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:48,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:48:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:48,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:48,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash 438706975, now seen corresponding path program 1 times [2023-11-29 00:48:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:48,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942051791] [2023-11-29 00:48:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:48,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:48,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:48,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813425743] [2023-11-29 00:48:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:48,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:48,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:48,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:48:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:48,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:48:48,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:48:50,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942051791] [2023-11-29 00:48:50,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813425743] [2023-11-29 00:48:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813425743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:50,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:50,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:48:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896984249] [2023-11-29 00:48:50,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:50,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:48:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:48:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:48:50,180 INFO L87 Difference]: Start difference. First operand 1531 states and 2402 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:50,663 INFO L93 Difference]: Finished difference Result 2981 states and 4626 transitions. [2023-11-29 00:48:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:48:50,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-29 00:48:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:50,678 INFO L225 Difference]: With dead ends: 2981 [2023-11-29 00:48:50,678 INFO L226 Difference]: Without dead ends: 1723 [2023-11-29 00:48:50,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:48:50,683 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 318 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:50,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1640 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:48:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-11-29 00:48:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1533. [2023-11-29 00:48:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1065 states have (on average 1.4328638497652582) internal successors, (1526), 1069 states have internal predecessors, (1526), 439 states have call successors, (439), 28 states have call predecessors, (439), 28 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-29 00:48:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2404 transitions. [2023-11-29 00:48:50,888 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2404 transitions. Word has length 522 [2023-11-29 00:48:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:50,889 INFO L495 AbstractCegarLoop]: Abstraction has 1533 states and 2404 transitions. [2023-11-29 00:48:50,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:48:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2404 transitions. [2023-11-29 00:48:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-29 00:48:50,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:50,895 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:50,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:48:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:48:51,098 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:51,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1842532928, now seen corresponding path program 1 times [2023-11-29 00:48:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:51,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32424510] [2023-11-29 00:48:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:51,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:51,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:51,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046363939] [2023-11-29 00:48:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:51,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:51,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:48:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:51,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:48:51,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 8076 proven. 288 refuted. 0 times theorem prover too weak. 5248 trivial. 0 not checked. [2023-11-29 00:48:53,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 150 proven. 96 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-29 00:49:00,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32424510] [2023-11-29 00:49:00,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046363939] [2023-11-29 00:49:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046363939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:00,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:49:00,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-11-29 00:49:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7786301] [2023-11-29 00:49:00,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:49:00,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:49:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:49:00,516 INFO L87 Difference]: Start difference. First operand 1533 states and 2404 transitions. Second operand has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 8 states have call successors, (166), 5 states have call predecessors, (166), 9 states have return successors, (166), 8 states have call predecessors, (166), 8 states have call successors, (166) [2023-11-29 00:49:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:19,773 INFO L93 Difference]: Finished difference Result 16091 states and 23847 transitions. [2023-11-29 00:49:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-11-29 00:49:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 8 states have call successors, (166), 5 states have call predecessors, (166), 9 states have return successors, (166), 8 states have call predecessors, (166), 8 states have call successors, (166) Word has length 523 [2023-11-29 00:49:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:19,847 INFO L225 Difference]: With dead ends: 16091 [2023-11-29 00:49:19,847 INFO L226 Difference]: Without dead ends: 14823 [2023-11-29 00:49:19,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1071 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20635 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=8589, Invalid=40031, Unknown=0, NotChecked=0, Total=48620 [2023-11-29 00:49:19,867 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 5141 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 5271 mSolverCounterSat, 3038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5185 SdHoareTripleChecker+Valid, 4212 SdHoareTripleChecker+Invalid, 8309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3038 IncrementalHoareTripleChecker+Valid, 5271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:19,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5185 Valid, 4212 Invalid, 8309 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3038 Valid, 5271 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2023-11-29 00:49:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14823 states. [2023-11-29 00:49:21,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14823 to 6104. [2023-11-29 00:49:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 4481 states have (on average 1.4168712340995313) internal successors, (6349), 4511 states have internal predecessors, (6349), 1453 states have call successors, (1453), 169 states have call predecessors, (1453), 169 states have return successors, (1453), 1423 states have call predecessors, (1453), 1453 states have call successors, (1453) [2023-11-29 00:49:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 9255 transitions. [2023-11-29 00:49:21,162 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 9255 transitions. Word has length 523 [2023-11-29 00:49:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:21,163 INFO L495 AbstractCegarLoop]: Abstraction has 6104 states and 9255 transitions. [2023-11-29 00:49:21,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 8 states have call successors, (166), 5 states have call predecessors, (166), 9 states have return successors, (166), 8 states have call predecessors, (166), 8 states have call successors, (166) [2023-11-29 00:49:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 9255 transitions. [2023-11-29 00:49:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-29 00:49:21,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:21,170 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:21,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:49:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:49:21,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:21,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash 456329534, now seen corresponding path program 1 times [2023-11-29 00:49:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:21,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450902094] [2023-11-29 00:49:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:21,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:21,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:21,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70675776] [2023-11-29 00:49:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:21,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:21,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:21,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:21,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:49:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:21,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:49:21,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9924 proven. 498 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2023-11-29 00:49:27,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450902094] [2023-11-29 00:49:48,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70675776] [2023-11-29 00:49:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70675776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:48,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:49:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 00:49:48,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917365757] [2023-11-29 00:49:48,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:48,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:49:48,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:49:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=757, Unknown=2, NotChecked=0, Total=992 [2023-11-29 00:49:48,732 INFO L87 Difference]: Start difference. First operand 6104 states and 9255 transitions. Second operand has 24 states, 24 states have (on average 6.0) internal successors, (144), 22 states have internal predecessors, (144), 8 states have call successors, (83), 8 states have call predecessors, (83), 12 states have return successors, (83), 8 states have call predecessors, (83), 8 states have call successors, (83) [2023-11-29 00:49:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:56,309 INFO L93 Difference]: Finished difference Result 20393 states and 30407 transitions. [2023-11-29 00:49:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 00:49:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.0) internal successors, (144), 22 states have internal predecessors, (144), 8 states have call successors, (83), 8 states have call predecessors, (83), 12 states have return successors, (83), 8 states have call predecessors, (83), 8 states have call successors, (83) Word has length 523 [2023-11-29 00:49:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:56,356 INFO L225 Difference]: With dead ends: 20393 [2023-11-29 00:49:56,356 INFO L226 Difference]: Without dead ends: 14660 [2023-11-29 00:49:56,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1280, Invalid=4120, Unknown=2, NotChecked=0, Total=5402 [2023-11-29 00:49:56,375 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1115 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 3562 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 4017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 3562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:56,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 2253 Invalid, 4017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 3562 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 00:49:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2023-11-29 00:49:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 8467. [2023-11-29 00:49:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8467 states, 6213 states have (on average 1.4056011588604538) internal successors, (8733), 6255 states have internal predecessors, (8733), 1967 states have call successors, (1967), 286 states have call predecessors, (1967), 286 states have return successors, (1967), 1925 states have call predecessors, (1967), 1967 states have call successors, (1967) [2023-11-29 00:49:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8467 states to 8467 states and 12667 transitions. [2023-11-29 00:49:58,049 INFO L78 Accepts]: Start accepts. Automaton has 8467 states and 12667 transitions. Word has length 523 [2023-11-29 00:49:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:58,049 INFO L495 AbstractCegarLoop]: Abstraction has 8467 states and 12667 transitions. [2023-11-29 00:49:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.0) internal successors, (144), 22 states have internal predecessors, (144), 8 states have call successors, (83), 8 states have call predecessors, (83), 12 states have return successors, (83), 8 states have call predecessors, (83), 8 states have call successors, (83) [2023-11-29 00:49:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8467 states and 12667 transitions. [2023-11-29 00:49:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-29 00:49:58,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:58,055 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:58,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:49:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:49:58,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:58,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash 879976256, now seen corresponding path program 1 times [2023-11-29 00:49:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:58,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981375180] [2023-11-29 00:49:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:58,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840724040] [2023-11-29 00:49:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:58,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:58,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:49:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:58,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:49:58,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:49:59,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981375180] [2023-11-29 00:49:59,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840724040] [2023-11-29 00:49:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840724040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:59,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:49:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172885382] [2023-11-29 00:49:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:49:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:49:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:49:59,169 INFO L87 Difference]: Start difference. First operand 8467 states and 12667 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:50:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:01,360 INFO L93 Difference]: Finished difference Result 22638 states and 33900 transitions. [2023-11-29 00:50:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:50:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-29 00:50:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:01,396 INFO L225 Difference]: With dead ends: 22638 [2023-11-29 00:50:01,396 INFO L226 Difference]: Without dead ends: 14577 [2023-11-29 00:50:01,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:50:01,413 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 129 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:01,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 817 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:50:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14577 states. [2023-11-29 00:50:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14577 to 14575. [2023-11-29 00:50:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14575 states, 10781 states have (on average 1.4111863463500602) internal successors, (15214), 10853 states have internal predecessors, (15214), 3317 states have call successors, (3317), 476 states have call predecessors, (3317), 476 states have return successors, (3317), 3245 states have call predecessors, (3317), 3317 states have call successors, (3317) [2023-11-29 00:50:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14575 states to 14575 states and 21848 transitions. [2023-11-29 00:50:03,894 INFO L78 Accepts]: Start accepts. Automaton has 14575 states and 21848 transitions. Word has length 523 [2023-11-29 00:50:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:03,895 INFO L495 AbstractCegarLoop]: Abstraction has 14575 states and 21848 transitions. [2023-11-29 00:50:03,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:50:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14575 states and 21848 transitions. [2023-11-29 00:50:03,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-29 00:50:03,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:03,901 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:03,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:50:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:50:04,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:04,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1899475716, now seen corresponding path program 1 times [2023-11-29 00:50:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446485607] [2023-11-29 00:50:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:04,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:04,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315920331] [2023-11-29 00:50:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:04,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:04,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:04,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:50:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:04,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:50:04,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 8904 proven. 108 refuted. 0 times theorem prover too weak. 4600 trivial. 0 not checked. [2023-11-29 00:50:05,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 138 proven. 108 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-29 00:50:05,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:05,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446485607] [2023-11-29 00:50:05,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:50:05,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315920331] [2023-11-29 00:50:05,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315920331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:05,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:50:05,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 00:50:05,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595365267] [2023-11-29 00:50:05,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:05,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:50:05,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:50:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:50:05,822 INFO L87 Difference]: Start difference. First operand 14575 states and 21848 transitions. Second operand has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 4 states have call successors, (140), 3 states have call predecessors, (140), 5 states have return successors, (140), 4 states have call predecessors, (140), 4 states have call successors, (140) [2023-11-29 00:50:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:17,951 INFO L93 Difference]: Finished difference Result 79142 states and 117385 transitions. [2023-11-29 00:50:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:50:17,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 4 states have call successors, (140), 3 states have call predecessors, (140), 5 states have return successors, (140), 4 states have call predecessors, (140), 4 states have call successors, (140) Word has length 523 [2023-11-29 00:50:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:18,085 INFO L225 Difference]: With dead ends: 79142 [2023-11-29 00:50:18,086 INFO L226 Difference]: Without dead ends: 64770 [2023-11-29 00:50:18,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1038 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 00:50:18,125 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 2179 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2250 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:18,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2250 Valid, 1772 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:50:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64770 states. [2023-11-29 00:50:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64770 to 50606. [2023-11-29 00:50:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50606 states, 39637 states have (on average 1.4212225950500794) internal successors, (56333), 40025 states have internal predecessors, (56333), 9505 states have call successors, (9505), 1463 states have call predecessors, (9505), 1463 states have return successors, (9505), 9117 states have call predecessors, (9505), 9505 states have call successors, (9505) [2023-11-29 00:50:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50606 states to 50606 states and 75343 transitions. [2023-11-29 00:50:26,674 INFO L78 Accepts]: Start accepts. Automaton has 50606 states and 75343 transitions. Word has length 523 [2023-11-29 00:50:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:26,674 INFO L495 AbstractCegarLoop]: Abstraction has 50606 states and 75343 transitions. [2023-11-29 00:50:26,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 4 states have call successors, (140), 3 states have call predecessors, (140), 5 states have return successors, (140), 4 states have call predecessors, (140), 4 states have call successors, (140) [2023-11-29 00:50:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 50606 states and 75343 transitions. [2023-11-29 00:50:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-29 00:50:26,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:26,691 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:26,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:50:26,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:50:26,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:26,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1876843462, now seen corresponding path program 1 times [2023-11-29 00:50:26,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:26,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948214234] [2023-11-29 00:50:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:26,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:26,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:26,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401278327] [2023-11-29 00:50:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:26,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:26,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:26,937 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:26,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:50:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:27,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:50:27,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 7263 proven. 288 refuted. 0 times theorem prover too weak. 6061 trivial. 0 not checked. [2023-11-29 00:50:28,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 288 proven. 201 refuted. 0 times theorem prover too weak. 13123 trivial. 0 not checked. [2023-11-29 00:50:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948214234] [2023-11-29 00:50:28,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:50:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401278327] [2023-11-29 00:50:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401278327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:28,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:50:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-29 00:50:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400827761] [2023-11-29 00:50:28,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:50:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:50:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:50:28,784 INFO L87 Difference]: Start difference. First operand 50606 states and 75343 transitions. Second operand has 21 states, 20 states have (on average 8.15) internal successors, (163), 19 states have internal predecessors, (163), 6 states have call successors, (119), 4 states have call predecessors, (119), 8 states have return successors, (120), 6 states have call predecessors, (120), 6 states have call successors, (120) [2023-11-29 00:50:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:40,788 INFO L93 Difference]: Finished difference Result 112156 states and 166065 transitions. [2023-11-29 00:50:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 00:50:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 8.15) internal successors, (163), 19 states have internal predecessors, (163), 6 states have call successors, (119), 4 states have call predecessors, (119), 8 states have return successors, (120), 6 states have call predecessors, (120), 6 states have call successors, (120) Word has length 523 [2023-11-29 00:50:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:40,885 INFO L225 Difference]: With dead ends: 112156 [2023-11-29 00:50:40,885 INFO L226 Difference]: Without dead ends: 63192 [2023-11-29 00:50:40,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1027 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1130, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 00:50:40,931 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 848 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:40,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 2095 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:50:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63192 states. [2023-11-29 00:50:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63192 to 36917. [2023-11-29 00:50:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36917 states, 29433 states have (on average 1.4342744538443244) internal successors, (42215), 29717 states have internal predecessors, (42215), 6469 states have call successors, (6469), 1014 states have call predecessors, (6469), 1014 states have return successors, (6469), 6185 states have call predecessors, (6469), 6469 states have call successors, (6469) [2023-11-29 00:50:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36917 states to 36917 states and 55153 transitions. [2023-11-29 00:50:47,260 INFO L78 Accepts]: Start accepts. Automaton has 36917 states and 55153 transitions. Word has length 523 [2023-11-29 00:50:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:47,261 INFO L495 AbstractCegarLoop]: Abstraction has 36917 states and 55153 transitions. [2023-11-29 00:50:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 8.15) internal successors, (163), 19 states have internal predecessors, (163), 6 states have call successors, (119), 4 states have call predecessors, (119), 8 states have return successors, (120), 6 states have call predecessors, (120), 6 states have call successors, (120) [2023-11-29 00:50:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36917 states and 55153 transitions. [2023-11-29 00:50:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-29 00:50:47,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:47,273 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:47,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:50:47,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:50:47,474 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:47,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash -11998090, now seen corresponding path program 1 times [2023-11-29 00:50:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:47,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405315589] [2023-11-29 00:50:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:47,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:47,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236185379] [2023-11-29 00:50:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:47,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:47,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:47,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:47,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:50:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:47,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 00:50:47,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9748 proven. 924 refuted. 0 times theorem prover too weak. 2940 trivial. 0 not checked. [2023-11-29 00:50:57,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 555 proven. 411 refuted. 0 times theorem prover too weak. 12646 trivial. 0 not checked. [2023-11-29 00:51:02,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:02,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405315589] [2023-11-29 00:51:02,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:51:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236185379] [2023-11-29 00:51:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236185379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:02,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:51:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 52 [2023-11-29 00:51:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385704348] [2023-11-29 00:51:02,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:02,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 00:51:02,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:02,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 00:51:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=1947, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 00:51:02,800 INFO L87 Difference]: Start difference. First operand 36917 states and 55153 transitions. Second operand has 52 states, 51 states have (on average 5.078431372549019) internal successors, (259), 49 states have internal predecessors, (259), 16 states have call successors, (166), 12 states have call predecessors, (166), 19 states have return successors, (166), 15 states have call predecessors, (166), 16 states have call successors, (166) [2023-11-29 00:51:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:37,395 INFO L93 Difference]: Finished difference Result 190783 states and 284612 transitions. [2023-11-29 00:51:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-29 00:51:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.078431372549019) internal successors, (259), 49 states have internal predecessors, (259), 16 states have call successors, (166), 12 states have call predecessors, (166), 19 states have return successors, (166), 15 states have call predecessors, (166), 16 states have call successors, (166) Word has length 524 [2023-11-29 00:51:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:37,593 INFO L225 Difference]: With dead ends: 190783 [2023-11-29 00:51:37,594 INFO L226 Difference]: Without dead ends: 154838 [2023-11-29 00:51:37,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11022 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=6457, Invalid=19949, Unknown=0, NotChecked=0, Total=26406 [2023-11-29 00:51:37,642 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 7080 mSDsluCounter, 6918 mSDsCounter, 0 mSdLazyCounter, 7361 mSolverCounterSat, 1555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7085 SdHoareTripleChecker+Valid, 7322 SdHoareTripleChecker+Invalid, 8916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1555 IncrementalHoareTripleChecker+Valid, 7361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:37,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7085 Valid, 7322 Invalid, 8916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1555 Valid, 7361 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-11-29 00:51:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154838 states. [2023-11-29 00:51:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154838 to 23172. [2023-11-29 00:51:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23172 states, 18997 states have (on average 1.4831289150918565) internal successors, (28175), 19121 states have internal predecessors, (28175), 3531 states have call successors, (3531), 643 states have call predecessors, (3531), 643 states have return successors, (3531), 3407 states have call predecessors, (3531), 3531 states have call successors, (3531) [2023-11-29 00:51:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23172 states to 23172 states and 35237 transitions. [2023-11-29 00:51:44,096 INFO L78 Accepts]: Start accepts. Automaton has 23172 states and 35237 transitions. Word has length 524 [2023-11-29 00:51:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:44,096 INFO L495 AbstractCegarLoop]: Abstraction has 23172 states and 35237 transitions. [2023-11-29 00:51:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.078431372549019) internal successors, (259), 49 states have internal predecessors, (259), 16 states have call successors, (166), 12 states have call predecessors, (166), 19 states have return successors, (166), 15 states have call predecessors, (166), 16 states have call successors, (166) [2023-11-29 00:51:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 23172 states and 35237 transitions. [2023-11-29 00:51:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-29 00:51:44,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:44,104 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:44,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:51:44,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:51:44,304 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:44,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:44,305 INFO L85 PathProgramCache]: Analyzing trace with hash 327986292, now seen corresponding path program 1 times [2023-11-29 00:51:44,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:44,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909725969] [2023-11-29 00:51:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:44,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:44,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:51:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024241074] [2023-11-29 00:51:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:44,354 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:44,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:51:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:44,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:51:44,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9822 proven. 822 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2023-11-29 00:51:50,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:51:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909725969] [2023-11-29 00:51:51,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:51:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024241074] [2023-11-29 00:51:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024241074] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:51,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:51:51,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [28] total 33 [2023-11-29 00:51:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520269391] [2023-11-29 00:51:51,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:51:51,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:51:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:51:51,256 INFO L87 Difference]: Start difference. First operand 23172 states and 35237 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:52:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:12,346 INFO L93 Difference]: Finished difference Result 88964 states and 133076 transitions. [2023-11-29 00:52:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:52:12,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 524 [2023-11-29 00:52:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:12,454 INFO L225 Difference]: With dead ends: 88964 [2023-11-29 00:52:12,454 INFO L226 Difference]: Without dead ends: 76367 [2023-11-29 00:52:12,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1017 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:52:12,475 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1114 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:12,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1331 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:52:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76367 states. [2023-11-29 00:52:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76367 to 21245. [2023-11-29 00:52:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21245 states, 17380 states have (on average 1.4833716915995396) internal successors, (25781), 17484 states have internal predecessors, (25781), 3251 states have call successors, (3251), 613 states have call predecessors, (3251), 613 states have return successors, (3251), 3147 states have call predecessors, (3251), 3251 states have call successors, (3251) [2023-11-29 00:52:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21245 states to 21245 states and 32283 transitions. [2023-11-29 00:52:18,426 INFO L78 Accepts]: Start accepts. Automaton has 21245 states and 32283 transitions. Word has length 524 [2023-11-29 00:52:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:18,426 INFO L495 AbstractCegarLoop]: Abstraction has 21245 states and 32283 transitions. [2023-11-29 00:52:18,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:52:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 21245 states and 32283 transitions. [2023-11-29 00:52:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-29 00:52:18,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:18,433 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:18,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:52:18,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:52:18,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:52:18,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash -327708686, now seen corresponding path program 1 times [2023-11-29 00:52:18,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:18,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294061066] [2023-11-29 00:52:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:18,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:18,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:52:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047746835] [2023-11-29 00:52:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:18,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:18,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:18,679 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:18,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:52:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:19,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 00:52:19,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9821 proven. 891 refuted. 0 times theorem prover too weak. 2900 trivial. 0 not checked. [2023-11-29 00:52:28,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:52:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294061066] [2023-11-29 00:52:28,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:52:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047746835] [2023-11-29 00:52:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047746835] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:28,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:52:28,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [34] total 39 [2023-11-29 00:52:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449343849] [2023-11-29 00:52:28,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:52:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:52:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:52:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:52:28,770 INFO L87 Difference]: Start difference. First operand 21245 states and 32283 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:52:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:35,731 INFO L93 Difference]: Finished difference Result 54758 states and 83565 transitions. [2023-11-29 00:52:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:52:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 524 [2023-11-29 00:52:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:35,776 INFO L225 Difference]: With dead ends: 54758 [2023-11-29 00:52:35,776 INFO L226 Difference]: Without dead ends: 42359 [2023-11-29 00:52:35,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 00:52:35,791 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 619 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:35,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 1269 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:52:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42359 states. [2023-11-29 00:52:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42359 to 21269. [2023-11-29 00:52:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21269 states, 17404 states have (on average 1.4834520799816133) internal successors, (25818), 17508 states have internal predecessors, (25818), 3251 states have call successors, (3251), 613 states have call predecessors, (3251), 613 states have return successors, (3251), 3147 states have call predecessors, (3251), 3251 states have call successors, (3251) [2023-11-29 00:52:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21269 states to 21269 states and 32320 transitions. [2023-11-29 00:52:41,312 INFO L78 Accepts]: Start accepts. Automaton has 21269 states and 32320 transitions. Word has length 524 [2023-11-29 00:52:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:41,312 INFO L495 AbstractCegarLoop]: Abstraction has 21269 states and 32320 transitions. [2023-11-29 00:52:41,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:52:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 21269 states and 32320 transitions. [2023-11-29 00:52:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-29 00:52:41,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:41,319 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:41,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:52:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:52:41,520 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:52:41,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1915997006, now seen corresponding path program 1 times [2023-11-29 00:52:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:41,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128020697] [2023-11-29 00:52:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:41,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:52:41,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456970993] [2023-11-29 00:52:41,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:41,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:41,564 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:41,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:52:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:41,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 00:52:41,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9742 proven. 666 refuted. 0 times theorem prover too weak. 3204 trivial. 0 not checked. [2023-11-29 00:52:47,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-29 00:52:47,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:47,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128020697] [2023-11-29 00:52:47,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:52:47,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456970993] [2023-11-29 00:52:47,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456970993] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:47,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:52:47,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [28] total 31 [2023-11-29 00:52:47,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938647615] [2023-11-29 00:52:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:52:47,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:52:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:52:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:52:47,733 INFO L87 Difference]: Start difference. First operand 21269 states and 32320 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:53:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:53:01,004 INFO L93 Difference]: Finished difference Result 57693 states and 86587 transitions. [2023-11-29 00:53:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:53:01,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 524 [2023-11-29 00:53:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:53:01,060 INFO L225 Difference]: With dead ends: 57693 [2023-11-29 00:53:01,060 INFO L226 Difference]: Without dead ends: 45114 [2023-11-29 00:53:01,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1018 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:53:01,075 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 718 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:53:01,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 1163 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:53:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45114 states. [2023-11-29 00:53:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45114 to 23046. [2023-11-29 00:53:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23046 states, 18813 states have (on average 1.4677616541753042) internal successors, (27613), 18933 states have internal predecessors, (27613), 3563 states have call successors, (3563), 669 states have call predecessors, (3563), 669 states have return successors, (3563), 3443 states have call predecessors, (3563), 3563 states have call successors, (3563) [2023-11-29 00:53:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23046 states to 23046 states and 34739 transitions. [2023-11-29 00:53:08,076 INFO L78 Accepts]: Start accepts. Automaton has 23046 states and 34739 transitions. Word has length 524 [2023-11-29 00:53:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:53:08,077 INFO L495 AbstractCegarLoop]: Abstraction has 23046 states and 34739 transitions. [2023-11-29 00:53:08,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-29 00:53:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 23046 states and 34739 transitions. [2023-11-29 00:53:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-29 00:53:08,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:53:08,084 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:08,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:53:08,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:08,285 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:53:08,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2130995843, now seen corresponding path program 1 times [2023-11-29 00:53:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:08,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463900666] [2023-11-29 00:53:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:08,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:08,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:53:08,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471120247] [2023-11-29 00:53:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:08,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:08,332 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:08,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:53:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:08,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:53:08,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9146 proven. 75 refuted. 0 times theorem prover too weak. 4391 trivial. 0 not checked. [2023-11-29 00:53:09,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 171 proven. 75 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-29 00:53:10,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463900666] [2023-11-29 00:53:10,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:53:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471120247] [2023-11-29 00:53:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471120247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:10,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:53:10,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 00:53:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428472557] [2023-11-29 00:53:10,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:53:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:53:10,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:53:10,005 INFO L87 Difference]: Start difference. First operand 23046 states and 34739 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 5 states have call successors, (140), 3 states have call predecessors, (140), 5 states have return successors, (140), 5 states have call predecessors, (140), 5 states have call successors, (140) [2023-11-29 00:53:27,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:53:27,958 INFO L93 Difference]: Finished difference Result 74334 states and 110766 transitions. [2023-11-29 00:53:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:53:27,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 5 states have call successors, (140), 3 states have call predecessors, (140), 5 states have return successors, (140), 5 states have call predecessors, (140), 5 states have call successors, (140) Word has length 525 [2023-11-29 00:53:27,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:53:28,029 INFO L225 Difference]: With dead ends: 74334 [2023-11-29 00:53:28,030 INFO L226 Difference]: Without dead ends: 52888 [2023-11-29 00:53:28,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1038 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:53:28,053 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1080 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:53:28,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 1712 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:53:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52888 states. [2023-11-29 00:53:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52888 to 23552. [2023-11-29 00:53:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23552 states, 19298 states have (on average 1.4717587314747642) internal successors, (28402), 19418 states have internal predecessors, (28402), 3563 states have call successors, (3563), 690 states have call predecessors, (3563), 690 states have return successors, (3563), 3443 states have call predecessors, (3563), 3563 states have call successors, (3563) [2023-11-29 00:53:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23552 states to 23552 states and 35528 transitions. [2023-11-29 00:53:35,615 INFO L78 Accepts]: Start accepts. Automaton has 23552 states and 35528 transitions. Word has length 525 [2023-11-29 00:53:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:53:35,615 INFO L495 AbstractCegarLoop]: Abstraction has 23552 states and 35528 transitions. [2023-11-29 00:53:35,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 5 states have call successors, (140), 3 states have call predecessors, (140), 5 states have return successors, (140), 5 states have call predecessors, (140), 5 states have call successors, (140) [2023-11-29 00:53:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23552 states and 35528 transitions. [2023-11-29 00:53:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-29 00:53:35,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:53:35,623 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:35,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 00:53:35,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:35,824 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:53:35,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2141339199, now seen corresponding path program 1 times [2023-11-29 00:53:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:35,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636868169] [2023-11-29 00:53:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:35,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:35,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:53:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945080917] [2023-11-29 00:53:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:35,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:35,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4206b227-e822-439e-aaed-1ccd555780f7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:53:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:36,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 00:53:36,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 8069 proven. 687 refuted. 0 times theorem prover too weak. 4856 trivial. 0 not checked. [2023-11-29 00:53:41,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:54:34,868 WARN L293 SmtUtils]: Spent 33.12s on a formula simplification. DAG size of input: 172 DAG size of output: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:55:43,912 WARN L293 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:56:01,288 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:57:03,793 WARN L293 SmtUtils]: Spent 33.85s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:57:11,479 WARN L293 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:57:23,219 WARN L293 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:58:16,963 WARN L293 SmtUtils]: Spent 11.88s on a formula simplification. DAG size of input: 93 DAG size of output: 93 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:59:08,555 WARN L293 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 11 DAG size of output: 1 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:59:36,708 WARN L293 SmtUtils]: Spent 19.74s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:02:10,277 WARN L293 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:02:25,275 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)